@mixin timeline-item-start-margins($first-item-margin: 0, $second-item-margin: 0) {
  & + .timeline-item:not(.timeline-item-left):not(.timeline-item-right) {
    margin-top: $first-item-margin;

    & + .timeline-item:not(.timeline-item-left):not(.timeline-item-right) {
      margin-top: $second-item-margin;
    }
  }
}